[Dev] Blocking UI in 0.7

[Andi Vajda]

> But I don't know about refresh() - Andi, is refresh() a time-consuming
> operation if lots of data is coming in from other views? Or if the
> incoming data doesn't conflict with the current view, maybe this is a
> cheap operation?

refresh is usually a lot cheaper than commit(). A situation where it may 
become more expensive is when there is a lot of merging going on, hopefully 
something rather rare.

Andi..